620 Slavia air riffle

Hi everyone, looking for the value of my two 620 Slavia, so I can sell my two pellet guns. I have a 1968 mint condition (240588) and one other in excellent condition 713970 Cssp.
Also where would be the best place to sell them?
Thanks for your help.
Kathi

Depends on the condition- they could be worth little more than a few dollars in parts, or possibly as much as $150.00-$200.00 each if in near-mint condition and fully working.